doc/filters: mention scale2ref in replacement example

So ctrl+f "scale2ref" finds it.
9 months ago · df868bae23
parent 8bf0a9c2ca
commit df868bae23
1 changed files with 1 additions and 1 deletions
--- a/doc/filters.texi
+++ b/doc/filters.texi
@ -21342,7 +21342,7 @@ scale='trunc(ih*dar/2)*2:trunc(ih/2)*2',setsar=1/1

@item
 Scale a subtitle stream (sub) to match the main video (main) in size before
-overlaying.
+overlaying. ("scale2ref")
@example
 '[main]split[a][b]; [ref][a]scale=rw:rh[c]; [b][c]overlay'
@end example